US6398700B1 - Roll for a paper/board machine or finishing device and method for fastening an inner tube into the interior of the same - Google Patents
Roll for a paper/board machine or finishing device and method for fastening an inner tube into the interior of the same Download PDFInfo
- Publication number
- US6398700B1 US6398700B1 US09/258,845 US25884599A US6398700B1 US 6398700 B1 US6398700 B1 US 6398700B1 US 25884599 A US25884599 A US 25884599A US 6398700 B1 US6398700 B1 US 6398700B1
- Authority
- US
- United States
- Prior art keywords
- roll
- fastening
- inner tube
- interior
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0253—Heating or cooling the rolls; Regulating the temperature
- D21G1/0266—Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
Definitions
- the present invention relates to a roll for a paper/board machine or for a paper/board finishing device and a method for fastening an inner tube in the interior of a roll of a paper/board machine or a paper/board finishing device.
- Polymer-coated rolls arranged in calenders require cooling so that they will operate optimally. By means of such cooling, attempts are made to keep the end and lateral areas of the roll at a uniform temperature so that the effect of crown formation by the effect of heat is minimized.
- the principle of the displacement tube technique is briefly as follows: water at the required temperature is passed to the end of the roll by means of a water coupling, water circulates in the interior of the roll along a space between an inner tube and an outer tube to the opposite end of the roll, and at the opposite end of the roll there is a water coupling through which the water is passed out of the roll.
- the space between the inner tube and the outer tube in the roll is usually quite small. In this manner, even though the amounts of water are quite small, attempts are made to keep the flow sufficiently large in order to meet the requirement of a uniform temperature in the end and lateral areas of the roll.
- It is an object of the present invention is to provide a solution for installing an inner tube in a roll by whose means the difficulties related to the prior art methods are overcome.
- the inner tube by whose means the water is forced to flow along the inner face of the mantle of the roll body, is fastened to the body mantle by fastening pistons which are installed on the inner tube with a necessary spacing in the longitudinal direction whereby three pistons are arranged in the direction of the circumference.
- pistons in the direction of the circumference, two are fixedly installed at a proper height in connection with the installation, and one is freely moving and spring-loaded.
- the spring-loaded piston is constructed so that, by means of hydraulics, the piston is pressed down for the time of installation of the inner tube.
- the pipe systems required by the hydraulics are passed along the outer face of the inner tube, preferably to the tending-side end of the roll.
- the pressure required by the hydraulics is produced by means of a normal hydraulic pump (the same pump by whose means the bearing is removed/fixed). After the inner tube has been installed in the correct position, the hydraulic pressure is released, and the disk springs of the spring-loaded piston press the piston against the body mantle. By means of the fixed and the spring-loaded pistons, the inner tube is kept in its position, and vibration and bending of the inner tube are prevented.
- the fastening at the ends is arranged either so that separate rings attached to the flange shafts by means of hexagonal socket-head bolts, on which rings the inner tube is installed with glide fitting, or, in new projects, so that alterations are made to the cast models of the flange shaft, and the end fastening face is provided directly on the flange shaft. In this manner, separate rings are not needed.
- a roll for a paper/board machine or finishing device comprises a roll mantle defining an interior and having an inner face, an inner tube arranged in the interior of the roll mantle and having an outer face arranged at a distance from the inner face of the roll mantle, and a plurality of fastening elements (or simply fastenings) for securing the inner tube to the roll mantle.
- At least one fixed fastening is positioned radially in a certain predetermined position (fixed in that it includes a piston which is not movable during the installation procedure) and a displaceable fastening is arranged to be displaceable in a radial direction of the inner tube (displaceable in that it includes a component which is movable during the installation procedure).
- the inner tube may comprise apertures at first and second ends and the roll further comprises first and second shafts arranged at first and second ends of the roll mantle. Each shaft includes a flow passage communicating with a space between the inner face of the roll mantle and the outer face of the inner tube via the apertures in the inner tube.
- the displaceable fastening comprises a spindle part having a head part and biasing means, e.g., a spring unit of one or more springs, for urging the head part against the inner face of the roll mantle. It may also comprise an interior space receivable of pressure fluid defined adjacent the spindle part.
- the biasing means are thus arranged such that upon removal of pressure fluid from the interior space (which occurs after the inner tube is installed in the interior of the roll), the head part is urged against the inner face of the roll mantle.
- the displaceable fastening may also comprise a piston part, whereby the interior space is defined between the piston part and the spindle part, and a sleeve defining a first interior space and a second interior space having a diameter smaller than a diameter of the first interior space and having an edge portion in the vicinity of an inlet opening of the first interior space.
- the sleeve defines an inside shoulder between the first and second interior spaces.
- the spindle part may include a rod connected to the head part and surrounded by the spring(s) of the spring unit.
- An intermediate disk may be arranged on the shoulder and a cotter ring may be provided to lock the disk against the shoulder.
- the disk includes a central opening through which the rod of the spindle part passes.
- the piston part includes an inner bore having threading and the rod includes a threading in engagement with the threading of the piston part.
- the fastening may include an end disk arranged at an end of the inner bore of the piston part, and a cotter coupled to the piston part for preventing rotation of the piston part. The cotter is guided in a hole in the sleeve of the fastening.
- the sleeve includes a duct for allowing passage of pressure fluid into and from the interior space in the fastening.
- Each fixed fastening comprises a sleeve and a screw arranged in the sleeve and having an outer face adapted to be pressed against the inner face of the roll mantle.
- the screw is rotatable relative to the sleeve to provide adjustable extension of the screw from the sleeve, which rotation is effected prior to installation or insertion of the inner tube into the interior of the roll mantle.
- the screw is then locked in its position and then the inner tube is inserted into the interior of the roll.
- the screw has a spindle part having a threaded outer surface and a backup part wider than the spindle part.
- the interior of the sleeve defines a wide recess and an end bore having a threading.
- the spindle part of the screw threadingly engages with the threading of the end bore of the sleeve.
- the backup part includes a curved outer face adapted to be pressed against the inner face of the roll mantle upon rotation of the screw relative to the sleeve.
- At least one first fastening is arranged in the inner tube at a location along an axis of the inner tube, each first fastening having an extension projectable above the outer face of the inner tube and designed to be fixed in position during installation of the inner tube into the interior of the roll.
- a second fastening is arranged in the inner tube at the same axial location as the first fastening(s), the second fastening having a displaceable spindle part movable between first and second position whereby the spindle part projects further above the outer face of the inner tube in the second position (although in the first position, the spindle part does not necessarily have to project above the outer face of the inner tube).
- each first fastening is adjusted and preferably fixed at a desired radial projecting position prior to installation of the inner tube in the interior of the roll.
- the inner tube is then inserted into the mantle of the roll while maintaining the spindle part of the second fastening in the first position.
- the spindle part of the second fastening is then displaced into the second position and urged against the inner face of the mantle, e.g., by the decompression of springs in a spring unit.
- the spindle part of the second fastening may be maintained in the first position by coupling a pipe to the second fastening, extending the pipe to one of the ends of the inner tube and directing a medium through the pipe to cause displacement of the spindle part of the second fastening to the first position such that control of the displacement of the spindle part of the second fastening is effected from the end of the inner tube.
- the spindle part of the second fastening may be maintained in the first position and caused to be displaced into the second position by coupling a pipe to the second fastening, arranging a piston part and a stationary disk in the second fastening, arranging at least one spring between a head part of the spindle part and the disk, and controlling the flow of pressure fluid through the pipe into and from a space between the disk and the piston part.
- the spindle part is moved to the first position and the at least one spring is compressed, and when the pressure fluid flows from the space, the spindle part is moved to the second position upon decompression of the at least one spring.
- FIG. 1 is a longitudinal sectional view of a roll in accordance with the invention.
- FIG. 2 is a sectional view taken along the line I—I in FIG. 1 .
- FIG. 3A is a sectional view of one of the two fastenings in the arrangement of three-point fastening.
- FIG. 3B shows the third fastening in the arrangement of three-point fastening, which third fastening comprises a hydraulic/spring-operated spindle.
- FIG. 1 is a longitudinal sectional view of a roll 10 in accordance with the invention.
- the fastening between the roll 10 and an inner tube 11 installed in the interior of the roll 10 is accomplished in accordance with the invention by means of piston elements, fastening elements or fastenings 13 a 1 , 13 a 2 and 13 a 3 placed in certain fastening planes, each at a respective location in the axial direction of the inner tube 11 .
- the fastenings 13 a are arranged preferably at the ends and in the middle of the roll so that each fastening arrangement in a plane at a point of the length of the roll 10 comprises a three-point fastening arrangement.
- the fastenings 13 a 1 , 13 a 2 and 13 a 3 are arranged at a uniform angular spacing, i.e., at an angular spacing of 120°, in relation to one another on the inner tube 11 that has been installed inside the roll 10 .
- the fastenings 13 a 1 , 13 a 2 and 13 a 3 in each fastening plane T 1 , T 2 and T 3 fasten the inner tube 11 in the interior space O in the roll mantle 10 a of roll 10 against the inner face 10 a 1 of the roll mantle 10 a , i.e., secure the inner tube 11 to the roll mantle 10 a .
- the inner tube 11 comprises a closed inner space O 2 and closing plates E 1 and E 2 passing across the tube 11 and placed in the vicinity of the ends of the tube 11 (but not at the end of the tube 11 so that a portion of the roll mantle 10 a remains outside of inner space O 2 ).
- spaces O 3 and O 4 are thus formed on the other side of plates E 1 and E 2 and the roll mantle 10 a includes flow passages such that water or any other heat transfer medium, preferably a cooling medium, can be passed from space O 3 along the roll mantle 10 a and then into space O 4 .
- the heat transfer medium can be passed in the axial direction of roll 10 through a flow passage J 1 in the center of a shaft 10 b 1 , and shaft flange 10 c into the space O 3 , from space O 3 through the flow passages N 1 formed at one end of the inner tube 11 into the space O 1 between the outer mantle face 11 a of the tube 11 and the inner mantle face 10 a 1 of the roll 10 and then through the tubular space O 1 in an axial direction of the roll 10 (arrows L 1 ).
- the heat transfer medium is able to flow from space O 1 through the flow passages N 2 formed at the other end of the tube 11 into the space O 4 .
- the medium may be passed through a central flow passage J 2 in the center of the shaft flange 10 c and shaft 10 b 2 of the roll 10 .
- the flow can also take place in the opposite direction, in which case the heat transfer medium, such as water, is initially passed into the other end of the roll 10 through the central flow passage J 2 in the shaft 10 b 2 .
- the roll 10 comprises shafts 10 b 1 , 10 b 2 which are attached to the roll mantle 10 a from their shaft flanges 10 c by means of screws R,R 1 .
- An end ring 10 d is attached to the flange 10 c by means of screws R 2 , and the end of the tube 11 is fitted around the end ring 10 d .
- the arrangements are similar at each end of the roll 10 .
- FIG. 2 is a sectional view taken along the line I—I in FIG. 1 .
- the fastenings 13 a 1 , 13 a 2 and 13 a 3 are arranged in the fastening plane T 1 so that they are coupled (engaged) both with the inner tube 11 and with the inner face 10 a 1 of the roll mantle 10 a of the roll 10 .
- the two fastenings 13 a 1 and 13 a 2 are identical, and the construction of the third fastening 13 a 3 differs from the fastenings 13 a 1 and 13 a 2 .
- FIG. 3A illustrates the construction of the fastening 13 a 1 , which is also the construction of fastening 13 a 2 , and is referred to herein as a fixed fastening.
- the fastening 13 a 1 comprises a sleeve 14 having an interior space D in which a screw 15 is mounted.
- the interior space D comprises a wider recess D 1 and an end bore D 2 (having a diameter smaller than the diameter of the wider recess D 1 ) and an inner threading N 1 on the end bore D 2 .
- the screw 15 is brought into engagement with inner threading N 1 by means of an outer threading N 2 of an extension or spindle part 15 a of the screw 15 .
- the screw 15 also comprises a wider backup or head part 15 b having a curved outer face 15 b 1 .
- a wider backup or head part 15 b On the face of the backup part 15 b , there is a groove U into which a seal ring U 1 has been fitted.
- the sleeve 14 comprises an edge widening 14 a at the mouth of the space D.
- the fastenings 13 a 1 , 13 a 2 on the inner tube 11 are placed in a certain position by rotating the screw 15 into a certain position in relation to the sleeve 14 so that a suitable degree of projection over the outer face 11 a 1 of the inner tube 11 is obtained for the head part 15 b of the screw 15 from the space D 1 in the sleeve 14 .
- the tube 11 is locked in the interior of the roll 10 by using the third fastening 13 a 3 for the locking so that when the third fastening 13 a 3 is released from the pressure of hydraulic fluid, it presses the head of a released spindle against the inner face 10 a 1 of the roll 10 by means of the spring force of its springs (discussed below with reference to FIG. 3 B).
- FIG. 3B illustrates the construction of the third fastening 13 a 3 .
- the fastening 13 a 3 comprises a sleeve 14 and an edge portion 14 a in the vicinity of the inlet opening of its interior space D 1 .
- the sleeve 14 comprises an interior first space D 1 and, at its end, a second interior space D 2 having a smaller diameter than first space D 1 and between which spaces, an inside shoulder i remains.
- the spindle part 16 comprises a rod 16 a and a head part 16 b which is connected with the rod 16 a and operates as a backup part and is coupled with the inner face 10 a 1 of the roll mantle 10 a of the roll 10 .
- An intermediate or backup disk 17 is situated on the shoulder i and is locked by means of a cotter ring 18 so that it is stationary.
- the intermediate disk 17 comprises a central opening B through which the rod 16 a of the spindle part 16 is passed freely.
- a seal 20 a is arranged in the opening B in the intermediate disk 17 between the intermediate disk 17 and the rod 16 a of the spindle part 16 .
- a seal 20 b is placed between the intermediate disk 17 and the inner face of the sleeve 14 .
- the head part 16 b of the spindle part 16 is provided with a groove U, in which there is a seal ring U 1 .
- the rod 16 a of the spindle part 16 is provided with a threading N 2 at its end, which threading N 2 is brought into engagement with the threading N 3 on an inner, central bore 21 a in a piston part 21 .
- the end of the central bore 21 a in the piston part is provided with an end disk 21 b .
- a cotter 22 which prevents rotation is arranged in engagement with the piston part 21 and to be guided freely in an end hole T in a portion of the space D 2 .
- the pressure fluid can be passed through a pipe 40 (see FIG.
- the effect of the pressurized fluid is discharged from the space D 2 and the springs 22 a 1 , 22 a 2 , . . . in the spring unit 22 press with a force between the backup disk 17 and the head part 16 b of the spindle part 16 so that the spindle part 16 and its head part 16 b are displaced in the direction S 2 .
- the curved backup face 16 b 1 of the head part 16 b is urged against the inner face 10 a , of the roll mantle 10 a 1 of the roll 10 .
- the fastening 13 a 3 is made free from the pressure of the hydraulic fluid (i.e., the hydraulic fluid is removed from interior space D 2 ), and the springs in the spring unit 22 of the fastening 13 a 1 are thereby allowed to act with a force so that the head part 16 b of the spindle part 16 of the fastening 13 a 3 is pressed by the spring force of the springs 22 a 1 , 22 a 2 , . . . against the inner mantle face 10 a 1 of the roll mantle 10 a of the roll 10 .
- a pipe/hose 40 (FIG. 1) can be connected to the fluid duct 41 of the fastening 13 a 3 .
- Pipe/hose 40 can be passed from the end of the inner tube 11 on the outer face of the inner tube 11 to the fastening 13 a 3 .
- the pressure fluid is passed from an actuator, for example from an actuator of a reversing cylinder, to the pipe 40 and further to the fastening 13 a 3 .
- the arrangement of the tubes one inside the other becomes clearly easier, as compared with prior art procedures.
- the mode of fastening also permits a larger play in respect of the measures of the outer and the inner tubes.
- inner tubes with equal diameter can be arranged in outer tubes with different diameters. Roll-specific tailoring is no longer needed, but inner tubes of standard diameter can be used. In this way, quicker installation and shorter delivery terms can be achieved.
Abstract
Description
Claims (14)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI980457A FI103605B1 (en) | 1998-02-27 | 1998-02-27 | Roll of paper machine / board machine or paper / board finishing equipment and method of attaching inner tube to roll inside of paper machine / board machine or paper / board finisher |
FI980457 | 1998-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US6398700B1 true US6398700B1 (en) | 2002-06-04 |
Family
ID=8551062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/258,845 Expired - Fee Related US6398700B1 (en) | 1998-02-27 | 1999-02-26 | Roll for a paper/board machine or finishing device and method for fastening an inner tube into the interior of the same |
Country Status (3)
Country | Link |
---|---|
US (1) | US6398700B1 (en) |
DE (1) | DE19907154B4 (en) |
FI (1) | FI103605B1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030181303A1 (en) * | 1999-03-29 | 2003-09-25 | Erkki Leinonen | Method for manufacturing a thermoroll for a paper/board machine or a finishing machine |
WO2007088240A1 (en) * | 2006-02-01 | 2007-08-09 | Metso Paper, Inc. | A method for controlling the normal frequency of vibration and a vibration damper |
US20080120957A1 (en) * | 2006-11-28 | 2008-05-29 | Didier Delphigue | Roller And Agricultural Machine |
CN102959257A (en) * | 2010-05-31 | 2013-03-06 | 沃依特专利有限责任公司 | Roller and method for avoiding its vibrations |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10162189A1 (en) * | 2001-12-18 | 2003-07-17 | Kuesters Eduard Maschf | Internally heated roller, has spring-loaded support for heating elements to compensate for changes in radial dimensions due to differential thermal expansion |
ITBO20050485A1 (en) * | 2005-07-20 | 2007-01-21 | S I M A Societa Ind Meccaniche | CYLINDER FOR DRIVING AND HEATING THE PLASTIC TAPES DURING THE PRODUCTION PHASE, POWERED ELECTRICALLY BY AN INTERNAL AND FIXED SOURCE |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3086279A (en) * | 1961-03-15 | 1963-04-23 | Ind Ovens Inc | Deflection minimizing double shell heat exchanging rolls |
US3389448A (en) * | 1965-04-21 | 1968-06-25 | Krantz H | Roller for uniform production of pressure |
US5103542A (en) * | 1988-05-11 | 1992-04-14 | Valmet Paper Machinery Inc. | Fluid distribution system for a variable-crown roll |
US5290223A (en) * | 1992-09-04 | 1994-03-01 | Sulzer-Escher Wyss Gmbh | Deflection controlled roll |
US5509883A (en) * | 1994-03-09 | 1996-04-23 | Valmet Paper Machinery, Inc. | Tubular roll for a paper machine or equivalent with glide-bearings |
US5685813A (en) * | 1995-02-22 | 1997-11-11 | Valmet Corporation | Tubular roll for a paper machine or equivalent with glide bearings |
US5702337A (en) * | 1994-07-01 | 1997-12-30 | Voith Sulzer Papiermaschinen Gmbh | Roll arrangement |
US5860903A (en) * | 1994-09-15 | 1999-01-19 | Valmet Corporation | Method and apparatus for supporting a roll mantle |
US5899264A (en) * | 1997-09-17 | 1999-05-04 | Marquip, Inc. | Steam supply and condensate removal apparatus for heated roll |
US5967957A (en) * | 1995-07-26 | 1999-10-19 | Eduard Kusters Maschinenfabrik Gmbh & Co. | Roller assembly with internal supporting elements |
US5967958A (en) * | 1995-05-09 | 1999-10-19 | Eduard Kusters Maschinenfabrik Gmbh & Co. Kg | Heatable roller |
US6017422A (en) * | 1997-09-30 | 2000-01-25 | Valmet-Karlstad Ab | Shoe press |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3304076A1 (en) * | 1983-02-07 | 1984-08-09 | Schwäbische Hüttenwerke GmbH, 7080 Aalen | LARGE DIMENSION ROLLER FOR MACHINES FOR THE PRODUCTION OF CONTINUOUS RAILWAY MATERIAL |
-
1998
- 1998-02-27 FI FI980457A patent/FI103605B1/en not_active IP Right Cessation
-
1999
- 1999-02-19 DE DE19907154A patent/DE19907154B4/en not_active Expired - Fee Related
- 1999-02-26 US US09/258,845 patent/US6398700B1/en not_active Expired - Fee Related
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3086279A (en) * | 1961-03-15 | 1963-04-23 | Ind Ovens Inc | Deflection minimizing double shell heat exchanging rolls |
US3389448A (en) * | 1965-04-21 | 1968-06-25 | Krantz H | Roller for uniform production of pressure |
US5103542A (en) * | 1988-05-11 | 1992-04-14 | Valmet Paper Machinery Inc. | Fluid distribution system for a variable-crown roll |
US5290223A (en) * | 1992-09-04 | 1994-03-01 | Sulzer-Escher Wyss Gmbh | Deflection controlled roll |
US5509883A (en) * | 1994-03-09 | 1996-04-23 | Valmet Paper Machinery, Inc. | Tubular roll for a paper machine or equivalent with glide-bearings |
US5566451A (en) * | 1994-03-09 | 1996-10-22 | Valmet Corporation | Method for providing a roll mantle of a tubular roll for a paper machine or equivalent with roll bearings |
US5702337A (en) * | 1994-07-01 | 1997-12-30 | Voith Sulzer Papiermaschinen Gmbh | Roll arrangement |
US5860903A (en) * | 1994-09-15 | 1999-01-19 | Valmet Corporation | Method and apparatus for supporting a roll mantle |
US5685813A (en) * | 1995-02-22 | 1997-11-11 | Valmet Corporation | Tubular roll for a paper machine or equivalent with glide bearings |
US5909917A (en) * | 1995-02-22 | 1999-06-08 | Valmet Corporation | Method for providing a roll mantle of a tubular roll for a paper machine or equivalent with glide bearings |
US5967958A (en) * | 1995-05-09 | 1999-10-19 | Eduard Kusters Maschinenfabrik Gmbh & Co. Kg | Heatable roller |
US5967957A (en) * | 1995-07-26 | 1999-10-19 | Eduard Kusters Maschinenfabrik Gmbh & Co. | Roller assembly with internal supporting elements |
US5899264A (en) * | 1997-09-17 | 1999-05-04 | Marquip, Inc. | Steam supply and condensate removal apparatus for heated roll |
US6017422A (en) * | 1997-09-30 | 2000-01-25 | Valmet-Karlstad Ab | Shoe press |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6708407B2 (en) * | 1909-03-29 | 2004-03-23 | Metso Paper, Inc. | Method for manufacturing a thermoroll for a paper/board machine or a finishing machine |
US20030181303A1 (en) * | 1999-03-29 | 2003-09-25 | Erkki Leinonen | Method for manufacturing a thermoroll for a paper/board machine or a finishing machine |
US6821237B1 (en) * | 1999-03-29 | 2004-11-23 | Metso Paper, Inc. | Thermoroll for a paper/board machine or finishing machine and a method for manufacturing the thermoroll |
WO2007088240A1 (en) * | 2006-02-01 | 2007-08-09 | Metso Paper, Inc. | A method for controlling the normal frequency of vibration and a vibration damper |
US20080120957A1 (en) * | 2006-11-28 | 2008-05-29 | Didier Delphigue | Roller And Agricultural Machine |
CN102959257A (en) * | 2010-05-31 | 2013-03-06 | 沃依特专利有限责任公司 | Roller and method for avoiding its vibrations |
Also Published As
Publication number | Publication date |
---|---|
FI103605B (en) | 1999-07-30 |
FI980457A0 (en) | 1998-02-27 |
FI103605B1 (en) | 1999-07-30 |
DE19907154B4 (en) | 2006-07-06 |
DE19907154A1 (en) | 1999-09-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: METSO PAPER, INC., FINLAND Free format text: CHANGE OF NAME;ASSIGNOR:VALMET CORPORATION;REEL/FRAME:012466/0973 Effective date: 20010101 Owner name: VALMET-RAUMA CORPORATION, FINLAND Free format text: MERGER;ASSIGNOR:VALMET OYJ;REEL/FRAME:012515/0358 Effective date: 19990701 |
|
AS | Assignment |
Owner name: VALMET CORPORATION, FINLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VALMET-RAUMA CORPORATION;REEL/FRAME:012544/0596 Effective date: 19990701 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
AS | Assignment |
Owner name: VALMET TECHNOLOGIES, INC., FINLAND Free format text: CHANGE OF NAME;ASSIGNOR:METSO PAPER, INC.;REEL/FRAME:032551/0426 Effective date: 20131212 |
|
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
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